Arithmetic and control unit



FIG. 1 is a perspective view of front, top and right side of an arithmetic and control unit showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof; and,

FIG. 8 is an enlarged view taken along line 8-8′ in FIG. 2.

Broken lines shown in the drawings illustrate portions of the arithmetic and control unit and form no part of the claimed design. 

CLAIM The ornamental design for an arithmetic and control unit, as shown and described. 